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    Methods and apparatus for increasing the robustness of media signatures
    22.
    发明授权
    Methods and apparatus for increasing the robustness of media signatures 有权

    公开(公告)号：US10530510B2

    公开(公告)日：2020-01-07

    申请号：US16263918

    申请日：2019-01-31

    Applicant: The Nielsen Company (US), LLC

    Inventor： Alexander Topchy ,  Venugopal Srinivasan

    IPC: H04H60/59 ,  H04N21/442 ,  H04H60/58 ,  H04H60/37 ,  H04N21/4363 ,  H04N21/439 ,  H04N21/44

    Abstract: Methods and apparatus for determining increasing robustness of media signatures are disclosed. An example apparatus includes a characteristic analyzer to determine a first difference between (A) a first characteristic of an audio signal at a first time and (B) a second characteristic of the audio signal at a second time. The apparatus further includes a characteristic enhancer to compare the first difference to a first threshold; at least one of (A) boost the first characteristic of the audio signal at the first time or (B) attenuate the second characteristic of the audio signal at the second time when the first difference does not satisfy the threshold to create an enhanced audio signal; and determine whether a second difference between a third characteristic of the enhanced audio signal at the first time and a fourth characteristic of the enhanced audio signal at the second time satisfies the threshold, the third characteristic corresponding to the first characteristic, the fourth characteristic corresponding to the second characteristic.

    Methods and apparatus to perform audio watermarking and watermark detection and extraction
    23.
    发明授权
    Methods and apparatus to perform audio watermarking and watermark detection and extraction 有权

    公开(公告)号：US10467286B2

    公开(公告)日：2019-11-05

    申请号：US15698373

    申请日：2017-09-07

    Applicant: The Nielsen Company (US), LLC

    Inventor： Venugopal Srinivasan ,  Alexander Topchy

    IPC: G10L19/00 ,  G06F16/683 ,  G11B20/10 ,  H04H20/31 ,  H04H60/37 ,  H04H60/58

    Abstract: Methods and apparatus to audio watermarking and watermark detection and extracted are described herein. Disclosed example methods to decode a watermark from an audio signal include averaging a second sequence of audio samples stored in a buffer with a first sequence of audio samples stored in the buffer to determine an averaged sequence of audio samples, the second sequence of audio samples being related to the first sequence of audio samples based on a repetition period associated with watermark data of the watermark to be decoded. Disclosed example methods also include determining whether to enable a stacker. Disclosed example methods further include, in response to the stacker being enabled, decoding the watermark from the averaged sequence of audio samples, and in response to the stacker being disabled, decoding the watermark from the first sequence of audio samples.

    AUDIO WATERMARKING FOR PEOPLE MONITORING
    24.
    发明申请
    AUDIO WATERMARKING FOR PEOPLE MONITORING 审中-公开

    公开(公告)号：US20190279650A1

    公开(公告)日：2019-09-12

    申请号：US16426979

    申请日：2019-05-30

    Applicant: The Nielsen Company (US), LLC

    Inventor： Alexander Topchy ,  Padmanabhan Soundararajan ,  Venugopal Srinivasan

    IPC: G10L19/018 ,  H04H60/45

    Abstract: Methods, apparatus, systems and articles of manufacture (e.g., physical storage media) to utilize audio watermarking for people monitoring are disclosed. Example people monitoring methods disclosed herein include determining, at a user device, whether a first trigger condition for emitting an audio watermark identifying at least one of the user device or a user of the user device is satisfied. Such example methods also include, in response to determining that the first trigger condition is satisfied, providing a first audio signal including the audio watermark to an audio circuit that is to output an acoustic signal from the user device.

    DETECTING MEDIA WATERMARKS IN MAGNETIC FIELD DATA
    25.
    发明申请
    DETECTING MEDIA WATERMARKS IN MAGNETIC FIELD DATA 审中-公开

    公开(公告)号：US20190272287A1

    公开(公告)日：2019-09-05

    申请号：US16417131

    申请日：2019-05-20

    Applicant: The Nielsen Company (US), LLC

    Inventor： Alexander Topchy ,  Venugopal Srinivasan

    IPC: G06F16/683 ,  G10L19/018 ,  G11B20/00

    Abstract: Methods, apparatus, systems and articles of manufacture (e.g., physical storage media) to detect media watermarks in magnetic field data are disclosed herein. Example media monitoring apparatus disclosed herein include means for transforming magnitude values of magnetic field data to a frequency domain to determine transformed magnetic field data, the magnetic field data associated with a first sampling rate, the magnetic field data obtained from a sensor. Disclosed example media monitoring apparatus also include means for detecting an audio watermark in a portion of the transformed magnetic field data associated with a first frequency, the audio watermark encoded in an audio signal, the audio watermark to have a frequency component associated with a second frequency different from the first frequency, the first frequency to be aliased relative to the second frequency based on the first sampling rate.

    METHODS AND APPARATUS TO TRACK WEB BROWSING SESSIONS
    28.
    发明申请
    METHODS AND APPARATUS TO TRACK WEB BROWSING SESSIONS 审中-公开

    公开(公告)号：US20170255706A1

    公开(公告)日：2017-09-07

    申请号：US15601543

    申请日：2017-05-22

    Applicant: The Nielsen Company (US), LLC

    Inventor： Alexander Topchy ,  Jan Besehanic

    IPC: G06F17/30

    Abstract: Methods and apparatus to tracker web browsing sessions are disclosed. An example method includes determining, by executing an instruction with a processor, if web pages accessed by browsers are associated with a known browsing session by matching numbers received in association with accesses to the web pages with a plurality of random numbers generated based on a known seed value, wherein the numbers are generated by random number generators of the browsers. The method further includes determining, by executing an instruction with the processor, a subset of the web pages corresponding to the known browsing session and to storing the association of the subset and the known browsing session in a browsing session database.

    Detecting media watermarks in magnetic field data
    29.
    发明授权
    Detecting media watermarks in magnetic field data 有权

    公开(公告)号：US09679053B2

    公开(公告)日：2017-06-13

    申请号：US14133069

    申请日：2013-12-18

    Applicant: The Nielsen Company (US), LLC

    Inventor： Alexander Topchy ,  Venugopal Srinivasan

    IPC: G06F17/00 ,  G06F17/30

    CPC classification number: G06F17/30743 ,  G10L19/018 ,  G11B20/00086

    Abstract: Methods, apparatus, systems and articles of manufacture (e.g., physical storage media) to detect media watermarks in magnetic field data are disclosed herein. Example methods disclosed herein to detect media watermarks can include accessing multidimensional magnetic field data representative of values of a magnetic field measured within a first distance of audio circuitry that is to output an audio signal corresponding to media presented by a media device. Such example methods can also include processing the multidimensional magnetic field data to detect a watermark included in the audio signal.

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